414 LICHKXACFI. [leCaXORA. 



Hab. On trunks and branches of fii-s and on fir pales in maritime and 

 upland tracts. — Distr. Eather rare in England ; not uncommon in 

 Scotland ; not seen from Wales or Ireland. — B. M. : Near Leith Hill, 

 Sun-ev : near Penzance, Cornwall : Buxton, Derbyshire ; Ayton Moor, 

 Cleveland, Yorkshire: Staveley, Westmoreland. West Lomond Hill, 

 Fifeshire ; Achmore, Ivillin, Ben Lawers, and BlaebeiTV Hill, Perth- 

 shire : Dm-ris, Kincardineshire ; Countesswells Wood, near Aberdeen ; 

 Rothiemurchus, Inverness-shire ; Applecros.s, Ross-shu-e. 



Yar. ,5. geograpMca Xyl. ex Cromb. Grevillea, xviii. p. 68.— 

 Thallus tinely decussate throughout, with black hypothalline lines. 

 Apothecia subminute, plane or somewhat convex, brown.— X. s»6- 

 fiisca e. geograjihica Mass. Eic. Lich. (1852) p. 6. — Brit. Exs. : 

 Mudd, n. 113 pro parte. 



A well-marked and rather fine variety. The numerous black lines with 

 which it is everywhere limited, so that the individual plants are of small 

 size, seem to belong to Lecidea paiasema, with which it is always asso- 

 ciated in our specimens. 



Hah. On shrubs and the branches of trees, cliiefly ash, in wooded 

 maritime and upland districts. — Distr. Only here and there throughout 

 Eno-land, S.W. Scotland, the S.W. Highlands, and the S. Grampians ; 

 no^doubt to be detected elsewhere. — B. M. : St. Leonard's Forest, 

 Sussex : New Forest, Hants : UUacombe, near Bovey Tracey, S. Devon ; 

 Bathampton, Somerset ; Desford, Leicestershire ; Malvern, Worcester- 

 shire ; Clifl^rigg, Cleveland, Y'orkshire. Airds, Appiii, Argyleshire ; 

 Finlarig, KiUin, Perthshire. 



92. L. atrynea Xyl. Flora, 1872, p. 250, nota 2.— Thallus deter- 

 minate or indeterminate, granulate or verrucoso-areolate, whitish or 

 grevish-white (K -f yellowish, CaCl— ). Apothecia moderate or some- 

 what large, plane or at length convex, brown or corneous-brown, the 

 thalline margin creuulate, rarely subentire ; paraphyses thickish ; 

 epithecium brown, granuloso-inspersed ; spores 0,011-18 mm. long, 

 0,006-9 mm. thick ; hymenial gelatine bluish, then wine-reddish 

 (the thecoe violet) with iodine. — Cromb. Grevillea, xviii. p. 68. — 

 L. s^|.bfusca e. atrynea Mudd, Man. p. 147 pro parte ; Cromb. Lich. 

 Brit. p. 51 ; Leight. Lich. Fl. p. 203, ed. 3, p. 187. Lecanora suh- 

 fusca C- atrynea Ach. Lich. Univ. (1810) p. 395. 



In some conditions this also closely resembles L. inigosa, of which, as 

 noted by Xylander (Flora, 1883, p. 107), it is almost a subspecies. The 

 British specimens, with a single exception saxicolous, are for the most part 

 not verv tvpical. At times the apothecia are infested with Sphceria epi- 

 cymotia Wallr., giving them much the aspect of those of L. coilocarpa. 

 The spermogones have the spermatia (Jide Nyl. in litt.) 0,020-30 mm. long, 

 0,0005 mm. thick. 



Hab. On rocks, veiT rarely on trunks of trees, in maritime and upland 

 situations. — Distr. Found only in a few locahties in Great Britain and 

 Ireland. B. M. : Shanklin, Isle of Wight; Buxton, Derbyshire; Bar- 

 mouth, Merionethshire ; near Whitehaven, Cumberland. Killin, Perth- 

 .<!hire; Hillof Ardo, near Aberdeen. Dinis Lsland, Killarney, co. Kerry. 



